PEAK6
CIEN icon

PEAK6’s Ciena CIEN Stock Holding History

PEAK6’s Portfolio CIEN Stock Details CIEN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$9.12M Sell
23,500
-133,400
-85% -$40.8M 0.02% 619
2025
Q4 		$36.7M Sell
156,900
-231,000
-60% -$44.8M 0.07% 227
2025
Q3 		$56.5M Buy
387,900
+348,800
+892% +$35.5M 0.08% 184
2025
Q2 		$3.18M Sell
39,100
-133,400
-77% -$9.57M 0.01% 1198
2025
Q1 		$10.4M Sell
172,500
-392,200
-69% -$31M 0.02% 582
2024
Q4 		$47.9M Buy
+564,700
New +$40.5M 0.1% 166

Other funds holding CIEN

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $645B AUM 30.41% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return

PEAK6's CIEN Position: Q1 2026 in Review

PEAK6 reduced its Ciena (CIEN) stake by 98% in Q1 2026, selling an estimated $38.9M and leaving 2,429 shares worth $943K. The position accounts for ﹤0.01% of the portfolio, ranked #1726.

PEAK6 first reported a position in CIEN in Q2 2025 and has held it in 4 quarters since. The position peaked at $30.3M in Q4 2025. 1,080 funds tracked by Wall St. Rank hold CIEN as of Q1 2026.

  • PEAK6 held 2,429 shares of Ciena worth $943K as of Q1 2026.
  • PEAK6 sold 127,065 Ciena shares in Q1 2026, an estimated $38.9M.
  • Ciena made up ﹤0.01% of PEAK6's portfolio in Q1 2026, its #1726 holding.
  • PEAK6 first reported a position in Ciena in Q2 2025 and has held it in 4 quarters since.
  • PEAK6's Ciena position peaked at $30.3M in Q4 2025.
  • 1,080 funds tracked by Wall St. Rank held Ciena as of Q1 2026.

Based on PEAK6's 13F filing for Q1 2026, filed 14 May 2026.